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CGP EDU Academic Team
Published on: August 13, 2026
A complex is represented as CoCl 3 . xH 2 O. Its 0.1 m solution in aqueous medium shows 
T f = 0.558 K. K f for water is 1.86 kg mol -1 K and assuming 100% ionisation of the complex having coordination number 6. The formula of the complex is
Text Solution
Verified by ExpertsThe correct answer is:
D
[Co(H 2 O) 5 Cl]Cl 2
T f = i x K f x m
0.558 = i x 1.86 x 0.1 
i = 3
So, the total no of ions produce by complex per mole should be 3
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